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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 71 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.987 − 911 =
  2. 2.308 − ? = 94
  3. 3.627 − 132 =
  4. 4.731 − 597 =
  5. 5.441 − ? = 117
  6. 6.? + 880 = 998
  7. 7.839 + 154 =
  8. 8.686 − 595 =
  9. 9.A train has 683 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  10. 10.278 + 695 =
  11. 11.A train has 643 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  12. 12.869 − 499 =
  13. 13.A train has 443 people in the front coaches and 430 people in the back coaches. How many people are on the train?
  14. 14.429 − ? = 214
  15. 15.A train has 394 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  16. 16.536 + 374 =
  17. 17.659 − 596 =
  18. 18.? + 256 = 715
  19. 19.A train has 523 people in the front coaches and 452 people in the back coaches. How many people are on the train?
  20. 20.A train has 821 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  21. 21.A school has 206 children. 171 of them are girls. How many boys are there?
  22. 22.A train has 799 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  23. 23.A school has 442 children. 239 of them are girls. How many boys are there?
  24. 24.? + 626 = 937
  25. 25.A school has 602 children. 224 of them are girls. How many boys are there?
  26. 26.118 + ? = 633
  27. 27.363 − ? = 259
  28. 28.651 − 157 =
  29. 29.741 − 210 =
  30. 30.895 + 100 =
  31. 31.768 + 124 =
  32. 32.A school has 472 children. 104 of them are girls. How many boys are there?
  33. 33.473 − ? = 127
  34. 34.978 − 871 =
  35. 35.822 + 160 =
  36. 36.A school has 804 children. 582 of them are girls. How many boys are there?
  37. 37.807 + 124 =
  38. 38.186 + 512 =
  39. 39.866 − 345 =
  40. 40.887 + ? = 989

Answer key

  1. 76
  2. 214
  3. 495
  4. 134
  5. 324
  6. 118
  7. 993
  8. 91
  9. 791
  10. 973
  11. 787
  12. 370
  13. 873
  14. 215
  15. 642
  16. 910
  17. 63
  18. 459
  19. 975
  20. 954
  21. 35
  22. 951
  23. 203
  24. 311
  25. 378
  26. 515
  27. 104
  28. 494
  29. 531
  30. 995
  31. 892
  32. 368
  33. 346
  34. 107
  35. 982
  36. 222
  37. 931
  38. 698
  39. 521
  40. 102

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